Contents

07 September 2018
Vol 361, Issue 6406

About The Cover

Cover image expansion

COVER Pronghorn (Antilocapra americana) ford the Green River in Wyoming, United States, on a 160-km migration in search of high-quality food. To navigate successfully, ungulates (hooved mammals) must learn when and where to migrate, and reintroduced populations of bighorn sheep and moose demonstrate that this knowledge is passed across generations. Conservation of migration corridors helps these animals maintain this cultural knowledge and sustain abundant populations. See pages 972 and 1023.
Photo: © Joe Riis